<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<iframe id="iframe" style="width: 100%; height: 100%;  overflow: visible; background: rgb(255, 255, 255);" scrolling="yes" src="http://www.kantu.com/" allowfullscreen="allowfullscreen" frameborder="0"></iframe>

</body>
<script>
    $(function () {
        $("#iframe").height($(window).height());
    })
</script>
</html>